Core for hollow-wall construction



. April 10, 1928. 1,665,573

B. P. WHEELER, JR

CORE FOR HOLLOW WALL CONSTRUCTION Filed Nov. 20, 1925 Patented Apr. 10, 1928.

UNITED STATES PATENT OFFICE.

GORE FOR HOLLOW-WALL CONSTRUCTION.

Application filed November 20, 1925. Serial No. 70,266.

My invention relates to improvements in cor-es for hollow wall construction.

The objectof my invent-ion is to provide a core for a hollow wall construction which requires no supporting means, and which can be made of either hollow or solid form, and providing means whereby it is moved upwardly by the turning of the same, so that the concrete can be poured therearound, and before fully setting, the same is moved upwardly a step so that av wall is constructed having a continuous vertical passage from the bottom to the top.

Another object of my invention is to provide a 'core of this character which is simple in construction and requiring no lifting means, and at the same time provide an effective core having certain details of struc ture hereinafter more fully set forth.

In the accoi'i'ipanying drawings Figure 1 is a vertical sectional view of a wall mold showing my improved core in operation therein.

Figure 2 is an enlarged side elevation of the lli'lPl'OYGCl core.

Referring now to the drawings, 1 repre-' sents the studding of a building, and Ethe inner wall of the mold, which passes around the studding, and so arranged that half of.

the studding embedded in the wall, 3 repre ts the outer face of the mold which may be of any desired form to represent stone, brick or the like, and which is held in position by means of tie wires 4, which pass around the studding and out through the outer wall 3 of the mold, and held against outward movement by the nipples 5, all of which forms a separate invention covered by my application of even date, and is simply shown to illustrate the operation of my improved core.

lviy improved core consists of a cylindrical member 6 having on its outer face the threads 7, which have considerable pitch and width and rounded, whereby the core may be readily turned in the concrete wall before it' fully sets. This cylindrical core may have openings 8 in its upper end to receive a crow bar, or may have its ends squared to receive a socket wrench, whereby the core may be turned.

I have shown the core 6 preferably of a sheet metal having the threads pressed outwardly thereon, but it will be understood that the same could be made of a solid bar with the threads on its outer face, or could be made in any desired manner, the broad invention residingin forming a core with threads of high pitch on its outer face so that the turning of the coredcauses it; to travel upwardly from within the partially set wall so that another-section of the concrete can be poured therearound, and the operation repeated until the wall is constructed to the desired height.

In starting the wall when the first pour is made it is only necessary that the cores be held in a perfect vertical position and after this the core will travel upwardlyby the turning thereof, and maintain its vertical position as a portion thereof always remains in the previously poured and partially set concrete. 7

Having thus fully described my invention what I claim is 1. A core for concrete construction work,

comprising a cylindrical member having' broad rounded high pitch threads on its outer face and adapted to be imbedded in concrete and moved upwardly by the rotation thereof in the concrete.

2. A core for concrete construction work comprising a sheet metal cylindrical niember having broad rounded high pitch threads pressed outwardly on its outer face and adapted to be imbe'dded in concrete and moved upwardly by. the rotation thereof in the concrete.

In testimony whereof, I have signed this specification. 

